630142731 has 6 divisors (see below), whose sum is σ = 910206180. Its totient is φ = 420095148.

The previous prime is 630142703. The next prime is 630142741. The reversal of 630142731 is 137241036.

630142731 is a `hidden beast` number, since 630 + 1 + 4 + 27 + 3 + 1 = 666.

It is not a de Polignac number, because 630142731 - 2¹³ = 630134539 is a prime.

It is a super-2 number, since 2×630142731² = 794159722864276722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 630142695 and 630142704.

It is not an unprimeable number, because it can be changed into a prime (630142741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35007921 + ... + 35007938.

It is an arithmetic number, because the mean of its divisors is an integer number (151701030).

Almost surely, 2^630142731 is an apocalyptic number.

630142731 is a deficient number, since it is larger than the sum of its proper divisors (280063449).

630142731 is a wasteful number, since it uses less digits than its factorization.

630142731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70015865 (or 70015862 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 630142731 is about 25102.6439045771. The cubic root of 630142731 is about 857.3266229442.

Adding to 630142731 its reverse (137241036), we get a palindrome (767383767).

The spelling of 630142731 in words is "six hundred thirty million, one hundred forty-two thousand, seven hundred thirty-one".